How do wireless remote control vibrators work?

Short Answer:
Wireless remote control vibrators use a radio signal to turn the vibrating
unit on and off.

Long Answer: Wireless
remote control vibrators are activated via a radio frequency signal
generated by a handheld controller, much the same was as a remote
control toy car operates. Both the vibrator and the remote controller
contain their own batteries to supply power. The radio signal from the
controller switches the motor in the vibrator on and off and controls
the speed. Usually there aren't any wires involved at all, but sometimes
the vibrator will have a tail-like antenna attached to it for better
reception.